ADJUSTABLE TURBOJET NOZZLE Russian patent published in 2022 - IPC F02K1/12 

FIELD: aircraft engine building.

SUBSTANCE: invention relates to the field of aircraft engine building, namely to the design of adjustable nozzles of turbojet engines. Adjustable nozzle of a turbojet engine, containing a housing installed in series, having a rectangular shape in the outlet section, subsonic flaps and supersonic flaps hinged to each other, side walls rigidly connected to the housing, as well as a flap control system connected to subsonic flaps and supersonic flaps through the mechanisms of governance, according to the present invention, it is equipped with heat shields installed on the side of the flow part in the housing, as well as on the side walls and subsonic doors and rigidly fixed on the body, side walls and subsonic doors, respectively, with the formation of a cooling path between the heat shields and the mentioned structural elements, the entrance to which communicates with the outer circuit of the engine, at the same time, each of the subsonic and supersonic flaps is made in a transverse section in the form of an obtuse angle, the apex of which is directed from the flow part, in addition, each subsonic flap is made of a central and two side parts rigidly connected along the adjacent ends, while the nearby surfaces of the subsonic and supersonic flaps located along the axes of their hinged joints are made conical, in addition, on the outer surface of each subsonic flap there are longitudinal, transverse and inclined with respect to the direction of the gas flow stiffeners installed at an angle to the longitudinal and transverse stiffeners, as well as brackets with lugs for connection with control mechanisms and supersonic flaps, installed along the central parts subsonic flaps, wherein each of the subsonic flaps is pivotally connected to the side walls, in addition, on the subsonic flap, along it, at least one row of holes is made, in which bushings are installed, as well as at least two rows of hook-shaped hooks from its side inner surface.

EFFECT: reducing losses during gas flow inside the flow path and external flow around the adjustable nozzle by increasing the rigidity of its design elements while maintaining its control parameters, the possibility of expanding the technology for manufacturing parts and minimizing their mass, which reduces weight and increases its efficiency and the engine as a whole.

7 cl, 4 dwg